Dahlia plant named &#39; Daseksogtyve&#39;

ABSTRACT

A new and distinct cultivar of  Dahlia  plant named ‘DASEKSOGTYVE’, characterized by its upright to spreading shape, with stiff and strong lateral stems and thick (mostly single but few with 2-3 leaflets) leaves; color of mature leaves are RHS Yellow-Green 147A (but darker) on the upper side, RHS Greyed-Green 191A on the underside; compound leaves 10-14 cm (4-5.5 in) in length, and 6-11 cm (2.4-4.3 in) in width. The more common single are leaves 5-15 cm (2-5.9 in) in length and 2.5-6 cm (1-2.4 in) in width; composite flower heads, 8-9 cm (3.1-3.5 in) in diameter, and a large number of RHS Green-Yellow between 1A and 1B ray florets (about 130 to 150).

LATIN NAME OF THE GENUS AND SPECIES OF THE CLAIMED PLANT

Dahlia Cav.

VARIETY DENOMINATION

‘DASEKSOGTYVE’

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Dahlia plant (breeders reference: 5903G), botanically known as Dahlia Cav., of the Compositae (Asteraceae) family. Hereinafter referred to by the cultivar name ‘DASEKSOGTYVE’.

The new Dahlia cultivar is a product of a planned breeding program conducted by the inventor, Rune Nielsen, in Stige, Denmark. The objective of the breeding program is to develop a new Dahlia cultivar with an upright, strong and healthy growth habit, and with good garden performance; fully double flowers (composite flower heads with many ray florets) with an attractive inflorescence color.

The new Dahlia cultivar originated from a cross, made in a controlled breeding program by the inventor in 2006, in Stige, Denmark. The female or seed parent is a white Dahlia cultivar designated ‘CATARINA’ (CPVO Grant No. 15621—unpatented in the US). The male or pollen parent is a Yellow colored Dahlia variety designated 4440F (unpatented in the US).

Asexual reproduction of the new Dahlia cultivar by terminal cuttings was first performed in November, 2007 in Stige, Denmark, and has demonstrated that the combination of characteristics as herein disclosed for the new cultivar are firmly fixed and retained through successive generations of asexual reproduction. The new cultivar reproduces true to type.

BRIEF SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined to be unique characteristics of ‘DASEKSOGTYVE’, which in combination distinguish this Dahlia as a new and distinct cultivar:

1. Cultivar with upright to spreading shape;

2. Cultivar with stiff and strong lateral stems and thick, mostly single leaves, but few with 2-4 leaflets. Color of mature leaves are RHS Yellow-Green 147A, but darker (upper side), RHS Greyed-Green 191A (underside);

3. Compound leaves 10-14 cm (4-5.5 in) in length, and 6-11 cm (2.4-4.3 in) in width. The more common single are leaves 5-15 cm (2-5.9 in) in length and 2.5-6 cm (1-2.4 in) in width;

4. Composite flower heads, 8-9 cm (3.1-3.5 in) in diameter, with a large number of ray florets (about 130-150); and

5. Ray florets which are Yellow-Green, between RHS 1A and RHS 1B on the upper side.

Plants of the new Dahlia ‘DASEKSOGTYVE’ differ from plants of the parent, ‘CATARINA’ (CPVO Grant No. 15621—unpatented in the US) in the traits described in Table 1.

(The unpatented male parent 4440F is no longer available for comparison).

TABLE 1 Comparison with Parent Variety New Cultivar Comparison Cultivar Trait ‘DASEKSOGTYVE’ ‘CATARINA’ Color of ray florets (fully opened) Upper side: Yellow-Green, RHS Green-White 157C, between RHS 1A RHS Yellow 3A and RHS 1B. at the base. Inflorescence head: Diameter About 8-9 cm 5 cm (2 in). (3.1-3.5 in).

Of the many commercial cultivars known to the present inventor, the most similar in comparison to the new Dahlia ‘DASEKSOGTYVE’ is the Dahlia cultivar ‘DAFIRE’ (Commercially known as ‘SUMATRA’) (CPVO Grant No. 7031—not patented in the US), in the characteristics described in Table 2:

TABLE 2 Comparison with Comparison Variety Comparison Cultivar New Cultivar ‘DAFIRE’/‘SUMATRA’ Trait ‘DASEKSOGTYVE’ CPVO Grant No. 7031 Plant Size Height: About 18-20 cm (7-7.9 in). About 17-19 cm (6.7-7.5 in). Diameter: About 28-30 cm (11-11.8 in). About 25-28 cm (9.8-11 in). Overall Plant Shape: Cylindrical, upright to slightly Cylindrical, upright to slightly spreading, with basal branching. spreading, with basal branching. Inflorescences in composite Inflorescences in composite heads. heads. Basal branches (including flowers) Length: About 18-20 cm (7-7.9 in). About 17-19 cm (6.7-7.5 in). Diameter: About 8-9 mm (0.31-0.35 in). About 8-9 mm (0.31-0.35 in). Strength: Stiff and strong. Stiff and strong. Color: RHS Yellow-Green 146A. RHS Yellow-Green 146B. Leaves Colour mature upper side: RHS Yellow-Green 147A RHS Yellow-Green 147A. (but darker). Underside: RHS Grayed-Green 191A RHS Grayed-Green 191A. Peduncle Diameter: About 3-4 mm (0.12-0.16 in). About 2-3 mm (0.08-0.12 in). Color of ray florets Upper side: Green-Yellow between RHS 1A Green-Yellow between RHS 1A and RHS 1B. and RHS 1B. Ray florets Quantity per 130-150. 55-60. Inflorescence head:

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photographs illustrate the overall appearance of the new Dahlia ‘DASEKSOGTYVE’ showing the colors as true as is reasonably possible with colored reproductions of this type. Colors in the photographs may differ slightly from the color value cited in the detailed botanical description, which accurately describe the color of ‘DASEKSOGTYVE’.

FIG. 1 shows a close-up view of the composite flower head from ‘DASEKSOGTYVE’.

FIG. 2 shows a side view perspective of a typical flowering plant of ‘DASEKSOGTYVE’ in a 11 cm (4.3 in) pot, at 7 weeks of age after potting the young plant.

FIG. 3 shows a close-up view of different development stages of the composite flower head of ‘DASEKSOGTYVE’.

FIG. 4 shows a close-up view of the 130-150 ray florets from one composite flower head of ‘DASEKSOGTYVE’

FIGS. 5, 6 and 7 show close-up views of the different single and compound leaf sizes of ‘DASEKSOGTYVE’.

FIG. 8 shows a comparison between ‘SUMATRA’ and ‘DASEKSOGTYVE’.

DETAILED BOTANICAL DESCRIPTION

The new Dahlia ‘DASEKSOGTYVE’ has not been observed under all possible environmental conditions. The phenotype of the new cultivar may vary with variations in environment such as temperature, light intensity, and day length without any change in the genotype of the plant.

The aforementioned photographs, together with the following observations, measurements and values describe the new Dahlia ‘DASEKSOGTYVE’ as grown in a protected environment in a glass, greenhouse in Fyn, Odense, Denmark, under conditions which closely approximate those generally used in commercial practice. During propagation, conducted in a glasshouse, vegetative cuttings were planted in small propagation pots with peat as substrate, and then placed in a plastic tunnel averaging about 21° C. (69.8° F.) and received photoperiodic treatments of 18 hours. Supplementary light was given when natural light fell below 3000-4000 Lux. Rooting occurred about 9-12 days after planting. In third week after sticking the cutting, the young plants were potted in a 19 cm pot in a glass-covered greenhouse, maintained at 18-22° C. (64.4-71.6° F.) during the day (warmer during sunny days), and at 17-19° C. (62.6-66.2° F.) during the night. Photoperiodic treatments were continued at 18 hours, and supplementary light was given when natural light fell below 3000-4000 Lux. Irrigation was done with water. The EC (μS/m) measured in the soil was maintained between 2.0 to 3.0. One week after potting, the first growth regulation was given: a spray with 85% daminozide, 0.2%, 40-100 ml/m². During the production time, 9 additional sprayings were given with 85% daminozide, 0.2%, 40-100 ml/m2.

Color references are made to The Royal Horticultural Society Colour Chart (R.H.S.), 2001 edition, except where general colors of ordinary significance are used. Color values were taken under June daylight conditions at approximately 12:00 PM and 2:00 PM in Fyn, Odense, Denmark. The age of the ‘DASEKSOGTYVE’ plants described is 10 weeks (including propagation time).

-   Classification:     -   -   Botanical.—Dahlia Cav. -   Parentage:     -   -   Female or seed parent.—Dahlia variety designated ‘CATARINA’             (CPVO Grant No. 15621 unpatented in the US).         -   Male or pollen parent.—Dahlia variety designated 4440F             (Unpatented). -   Propagation:     -   -   Type.—Vegetative terminate cuttings.         -   Time and Temperature to initiate roots.—About 9-12 days at             21° C. (69.8° F.) in tunnels or flat covered in a             greenhouse.         -   Time and temperature to produce a rooted young plant.—About             21 days at 21° C. (69.8° F.) during rooting phase, followed             by 18° C. (64.4° F.).         -   Rooting habit.—Fine, fibrous; Color of root: RHS             Yellow-white 155C.         -   Tuber development.—Plants might develop tubers in late fall             when planted outside. -   Plant description:     -   -   General appearance and form.—Upright to spreading, with             basal branching. Inflorescences in composite heads.         -   Growth rate.—Growing about 1 to 3 cm per week during             production period.         -   Plant height (from soil level to top of plant plane).—About             18-20 cm (7-7.9 in).         -   Plant width (spread).—About 28-30 cm (11-11.8 in).         -   Crop time to produce a mature flowering plant.—It requires 3             weeks to produce a young plant in a 35 mm (1.4 in)             propagation plug. After potting, 8 to 10 weeks are required             to produce finished flowering plants in 11 cm (4.3 in) pots. -   Stem: Plants have been pinched a present soil level, so branches     might be considered the stems. -   Branches:     -   -   Branching habit.—Basal branching (increased because of the             pinching); few lateral branches.         -   Number of basal branches per plant.—About 3-5 (when pinched             above 3 pair of leaves).         -   Length (including flowers).—About 18-20 cm (7-7.9 in).         -   Diameter.—About 8-9 mm (0.31-0.35 in).         -   Strength.—Stiff and strong.         -   Aspect.—Upright to slightly spreading.         -   Texture.—Smooth and glabrous.         -   Color.—Mature: RHS Yellow-Green 146A. Immature: RHS             Yellow-Green 146A.         -   Internodes length.—About 10-25 mm (0.39-0.98 in).         -   Internodes color.—RHS Yellow-Green 146A. -   Foliage description:     -   -   Type.—Lower leaves: Single Middle leaves: Single and a few             compound, 2-4 lobed. Upper leaves: Single.         -   Number of leaves per branch.—About 8-10 per branch.         -   Color of leaves (leaves and leaflets) Color of upper side             (mature) RHS Yellow-Green 147A (but darker). Color of             underside (mature) RHS Grayed-Green 191A. Color of upper             side (immature) RHS Green 137A. Color of underside             (immature) RHS Green 137C.         -   Venation (leaves and leaflets).—Pattern: Pinnate. Color of             upper side: RHS Yellow-Green 146A. Color of underside: RHS             Yellow-Green 146C. -   Compound leaves:     -   -   Number of leaflets per compound leaf.—2-3.         -   Length of compound leaf.—10-14 cm (4-5.5 in).         -   Width of compound leaf.—6-11 cm (2.4-4.3 in).         -   Petiole of compound leaves.—Shape: Semi circular, with deep             furrow on adaxial side. Length: 3-6 cm (1.2-2.4 in).             Diameter: 2-4 mm (0.08-0.16 in). Texture: Smooth and             glabrous. Color Upper side along furrow: RHS Yellow-Green             146B. Underside: RHS Yellow-Green 146D.         -   Leaflets of compound leaf.—Terminal leaflet quantity: 1.             Terminal leaflet length: 6-8 cm (2.4-3.1 in).         -   Terminal leaflet width.—3-5 cm (1.2-2 in).         -   Terminal leaflet shape.—Ovate.         -   Terminal leaflet shape at apex.—Acuminate.         -   Terminal leaflet shape at base.—Cordate.         -   Terminal leaflet margin.—Dentate.         -   Terminal leaflet texture (both sides).—Rugose.         -   Rachis length.—0-20 mm (0-0.8 in).         -   Rachis diameter.—2-4 mm (0.08-0.16 in).         -   Rachis color.—Upper side along furrow: RHS Yellow-Green             146B. Underside: RHS Yellow-Green 146D.         -   Lateral leaflet quantity.—1-3.         -   Lateral leaflet length.—3-5 cm (1.2-2 in).         -   Lateral leaflet width.—1.5-3 cm (0.6-1.2 in).         -   Lateral leaflet overall shape.—Ovate.         -   Lateral leaflet shape at apex.—Acuminate (mostly             asymmetric).         -   Lateral leaflet shape at base.—Attenuate to rounded (not             always symmetric).         -   Lateral leaflet margin.—Dentate.         -   Lateral leaflet texture (both sides).—Rugose. -   Simple leaves:     -   -   Simple leaves overall shape.—Ovate.         -   Simple leaves shape at apex.—Acuminate.         -   Simple leaves shape at base.—Cordate to rounded.         -   Simple leaves length.—5-15 cm (2-5.9 in).         -   Simple leaves width.—2.5-6 cm (1-2.4 in).         -   Simple leaves margin.—Dentate.         -   Simple leaves texture.—Rugose.         -   Petiole shape.—Semi circular, with deep furrow on adaxial             side.         -   Petiole length.—1-5 cm (0.4-2 in).         -   Petiole diameter.—2-5 mm (0.08-0.2 in).         -   Petiole texture.—Smooth and glabrous.         -   Petiole color.—RHS Yellow-Green 146B. Upper side along             furrow: RHS Yellow-Green 146A. Underside: RHS Yellow-Green             146B. -   Inflorescence description:     -   -   Natural flowering season.—Grown outside as a bedding plant,             flowering occurs continuously during growing season from             spring to autumn/(In Denmark, from June to beginning of             October). Plants can be brought to flower anytime when grown             under the recommended greenhouse conditions.         -   Time to flower.—40 to 50 days from potting a young plant             until flowering.         -   Inflorescence longevity on the plant.—Inflorescence will             maintain good color and substance for about 4-8 days;             however, the longevity of individual inflorescence is highly             dependent on temperature and light conditions. Inflorescence             persistent.         -   Type.—Composite flower heads.         -   Arrangement and shape.—Persistent, single, composite             inflorescences from leaf axils. Disc and ray florets             arranged acropetally in a composite flower head. Upright,             slightly spreading. Terminal young flower head/buds             initially 0-45°. Buds from axillary shoots; 20-90°. When             flower opens 10-45°.         -   Quantity of inflorescences heads.—Freely flowering; about 20             buds and open inflorescences per plant.         -   Fragrance.—None.         -   Bud (Inflorescences head).—         -   Rate of opening (from showing color to fully open).—4-8             days. The rate of opening is highly dependent on temperature             and light conditions. Length: About 8-10 mm (0.3-0.4 in).             Diameter: About 14-16 mm (0.55-0.63 in). Shape: Flat             globular. Texture: Glabrous, shining. Color: RHS             Yellow-Green N144A.         -   Peduncle.—From both terminate and axillary shoots. Length:             About 4-8 cm (1.6-3.1 in). Diameter: About 3-4 mm (0.12-0.16             in). Angle: About 0-20° from vertical. Strength: Stiff and             strong. Texture: Glabrous. Color (mature): RHS Yellow-Green             between 146A and 146B. Color (immature): RHS Yellow-Green             146A.         -   Receptacle.—Height: About 3 mm (0.12 in). Diameter: About             6-8 mm (0.24-0.31 in). Color: RHS Yellow-Green 146A.         -   Inflorescence head.—Depth (height): About 4-5 cm (1.6-2 in).             Diameter: About 8-9 cm (3.1-3.5 in).         -   Disc diameter.—About 8-10 mm (0.31-0.39 in).         -   Ray florets.—Arrangement: Imbricate, in about 12-14 whorls             of ray florets, each with 10-12 florets to equal a total of             about 130-150 ray florets per flower head, depending on             light and temperature conditions. Quantity per Inflorescence             head: 130-150. Length: 35-38 mm (1.4-1.5 in). Widths: 22-26             mm (0.9-1 in). Overall shape: Obovate. Apex shape: Rounded.             Base shape: Acuminate, slightly fused. Margin: Entire, with             1-3 very small (1mm) teeth at the apex. Texture: Glabrous             (upper side and underside). Color when opening Fused ray             floret starting to show color: RHS Yellow 2A. Color when             fully opened Color upper side: RHS Green-Yellow between 1A             and 1B. Color underside: RHS Green-Yellow 1C.         -   Disc florets.—Arrangement: 35-45 yellow-orange disc florets             arranged in the center of inflorescence head. Appearance:             Quantity per Inflorescence head: 35-45. Length: 11-12 mm             (0.43-0.47 in). Diameter: 2 mm (0.08 in). Overall shape:             Tubular. Apex shape: Star with 5 triangular tips. Base             shape: Fused to tube. Color RHS Yellow-Orange 17A, RHS             Yellow-Green 145C near base.         -   Phyllary.—Arrangement: One subtending each floret. Quantity:             156-195. Length: 15-18 mm (0.6-0.7 in). Width: 4-5 mm             (0.16-0.2 in). Overall shape: Rounded. Shape at apex: Acute             with rounded tip. Shape at base: Fused. Margin: Entire.             Color: Mature: RHS Yellow-Green 151A. RHS 144A on underside             of the 8-10 phyllaries in the outer whorl. Immature: RHS             Yellow-Green 151A (both sides).         -   Bracts.—Arrangement and appearance: Reflexed, involucral             bracts. Quantity: 7-9. Length: 10-12 mm (0.4-0.5 in). Width:             5-6 mm (0.2-0.24 in). Overall shape: Subulate. Apex shape:             Acute. Base shape: Sessile. Margin: Entire. Texture:             Glabrous. Color mature Upper side: RHS Green 137A.             Underside: RHS Green 137B. Color immature Upper side: RHS             Green 137A. Underside: RHS Green 137B. -   Reproductive organs:     -   -   Androecium.—Location: Disc florets only. Stamen number: 5,             fused into synandrous tube around style. Stamen length:             About 8 mm (0.31 in). Anther shape: Tubular. Anther length:             About 4-5 mm (0.16-0.2 in). Pollen amount: Very little.             Pollen color: RHS Orange N25C.         -   Gynoecium.—Location: Ray and disc florets (Gynoecium at ray             florets is very poorly developed). Quantity: 1. Pistil             length: About 12 mm (0.47 in). Stigma shape: Bifurcate.             Stigma length: About 4 mm (0.16 in). Stigma color: RHS             Orange N25D. Style length: About 8 mm (0.31 in). Style             color: RHS Yellow 2C. Ovary color: RHS Yellow 2D. -   Seed/fruit: Seed and fruit production has not been observed. -   Disease/pest resistance: Resistance to pathogens and pests common to     Dahlia has not been observed. -   Disease/pest susceptibility: Susceptibility to pathogens and pests     common to Dahlia has not been observed. -   Temperature tolerance: Plants of the new Dahlia have exhibited good     tolerance to rain, wind and drought; however, flowering may cease     during hot periods (temperatures above 25° C./77° F.). Low     temperature tolerance to 1° C./33.8° F. -   Growth regulators: Daminozide (85% water soluble dryconcentrate     formulation). 

What is claimed is:
 1. A new and distinct cultivar of Dahlia plant named ‘DASEKSOGTYVE’, as illustrated and described herein. 